Transcatheter Strategies for Leaflet Extension to Treat Mitral Regurgitation
经导管小叶延伸治疗二尖瓣反流策略
基本信息
- 批准号:9754866
- 负责人:
- 金额:$ 38.49万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2017
- 资助国家:美国
- 起止时间:2017-09-01 至 2021-08-31
- 项目状态:已结题
- 来源:
- 关键词:AcuteAddressAmericanAnimal ModelAnteriorBiomedical EngineeringBloodCardiacCardiac Surgery proceduresCathetersChronicClinicalClipComplexComplicationCongestive Heart FailureDataDevelopmentDevice DesignsDevicesEchocardiographyEndotheliumEngineeringEnhancersEnvironmentFDA approvedFailureFamily suidaeFutureGeometryHeartHeart ResearchHeart ValvesHeart failureHeightImplantLeftLeft Ventricular RemodelingLengthLesionLiquid substanceMeasurementMeasuresMechanicsMedicalMitral ValveMitral Valve InsufficiencyModelingMyocardial InfarctionMyocardial IschemiaOperative Surgical ProceduresOutcomePatientsPharmaceutical PreparationsPhysiologicalPolytetrafluoroethyleneProceduresPublic HealthRecording of previous eventsRecurrenceRefluxResearch Project GrantsResidual stateRiskSafetySarinSiteSudden DeathSurfaceSurgeonSystemTechniquesTechnologyTestingThe SunTherapeuticThrombosisTimeTissuesTranslational ResearchTranslationsVentricularVentricular RemodelingWorkanimal imagingbasebiomechanical engineeringclinical practiceclinical translationdesignengineering designexperiencefeasibility trialflexibilityhealingheart functionhospitalization ratesimage guidedimprovedinnovationinsightmembermortalitymultidisciplinarynew technologynitinolnovelparallelizationpreservationprototyperepairedsafety and feasibilitysoundsuccesssurgical researchtissue stress
项目摘要
ABSTRACT/PROJECT SUMMARY
Ischemic mitral regurgitation (IMR) is reflux of blood through the mitral valve, developing in patients surviving a
myocardial infarction or chronic ischemic heart disease. 2.7 million Americans suffer from this condition and
progressively develop congestive heart failure. Their hospitalization rates are higher and they present with
significant risk of sudden death. Timely correction of IMR can halt adverse ventricular remodeling, but current
techniques to repair IMR require open-heart surgery, a risky procedure in these patients. Several transcatheter
strategies are in development, but all of them have demonstrated poor outcomes with significant remnant
regurgitation or repair failure due to procedural complexity. We hypothesized that the most effective and
durable technique to correct IMR is by extending the native leaflet lengths at the site of the regurgitation,
restoring systolic leaflet edge parallelization, so that coaptation is restored and regurgitation is effectively
eliminated. We developed a novel, flexible;; nitinol implant covered with expanded polytetrafluoroethylene,
which when deployed on the anterior or posterior mitral valve leaflet extends the leaflet shelf and restores
leaflet coaptation. The device integrates into the native leaflet with tissue encapsulation over 4-6 weeks, and
the endothelialized tissue permanently adds to the native leaflet length for IMR correction. Strong preliminary
data supporting the feasibility and safety of this concept have been generated in ex vivo and swine models. In
this R01 application, we propose to advance this concept further, with a focus on optimizing the device design
to best restore valve function and preserve valve mechanics. Three aims are proposed - (Aim 1) Optimize the
device features to achieve best IMR reduction and highest leaflet coaptation, while preserving the native valve
mechanics and fluid dynamics;; (Aim 2) investigate the durability of the device in correcting IMR in a
progressively remodeling LV, investigate chronic device healing and tissue remodeling, and measure the
thrombotic potential of the device in swine;; and (Aim 3) develop a trans-septal delivery catheter for image
guided deployment of the device on the mitral valve, and assess the safety and efficacy of this procedure in
swine. We have assembled a collaborative, multidisciplinary team with experience in biomedical device design
& engineering, computational tissue and fluid mechanics, animal models and imaging, and clinical experience
in transcatheter valve therapies, in an environment with a history of innovative cardiac research. There is high
potential for clinical translation of this technology, and the proposed work will optimize the technology and
mitigate the failure modes & risks. Completion of the proposed aims will result in a significantly better
therapeutic option to repair ischemic mitral regurgitation, which is a highly translational end-point and will
address a significant unmet clinical need.
摘要/项目总结
缺血性二尖瓣返流(IMR)是血液通过二尖瓣返流,发生在存活时间超过10年的患者中。
心肌梗塞或慢性缺血性心脏病。270万美国人患有这种疾病,
他们的住院率更高,并且他们表现出
及时纠正IMR可以阻止不利的心室重构,但目前
修复IMR的技术需要心内直视手术,这在这些患者中是一种危险的手术。
正在制定战略,但所有这些战略都显示出效果不佳,
我们假设,最有效的,
纠正IMR的持久技术是在返流部位延长自体瓣叶长度,
恢复收缩期瓣叶边缘平行化,从而恢复接合并有效地
消除。我们开发了一种新颖的、柔性的、覆盖有膨胀聚四氟乙烯的镍钛合金植入物,
其当在前或后二尖瓣小叶上展开时延伸小叶架并恢复
该装置整合到天然小叶中,组织包封超过4- 16周,并且
内皮化组织永久性地增加了天然瓣叶长度,用于IMR矫正。
已经在离体和猪模型中产生了支持该概念的可行性和安全性的数据。
在R 01应用中,我们建议进一步推进这一概念,重点是优化器件设计
以最好地恢复瓣膜功能并保持瓣膜力学。提出了三个目标-
器械特征可实现最佳IMR减少和最高瓣叶接合,同时保留自体瓣膜
力学和流体动力学;研究(目标2)在纠正IMR中器械的耐久性,
进行性重塑LV,研究慢性器械愈合和组织重塑,并测量
该器械在猪体内的血栓形成潜力;研究和(目标3)开发一种用于成像的经房间隔输送导管
在二尖瓣上引导器械展开,并评估该手术在以下方面的安全性和有效性:
我们已经组建了一个具有生物医学设备设计经验的多学科协作团队
计算组织和流体力学,动物模型和成像,以及临床经验
在具有创新心脏研究历史的环境中,
该技术的临床转化潜力,拟议的工作将优化该技术,
减少故障模式和风险。完成拟议目标将导致一个明显更好的
修复缺血性二尖瓣返流的治疗选择,这是一个高度平移的终点,
解决了重大的未满足的临床需求。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(1)
数据更新时间:{{ journalArticles.updateTime }}
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
数据更新时间:{{ journalArticles.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ monograph.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ sciAawards.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ conferencePapers.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ patent.updateTime }}
Sai Muralidhar Padala其他文献
Sai Muralidhar Padala的其他文献
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
{{ truncateString('Sai Muralidhar Padala', 18)}}的其他基金
Novel therapeutic approaches to Mitral valve repair in ischemic heart disease
缺血性心脏病二尖瓣修复的新治疗方法
- 批准号:
9756450 - 财政年份:2017
- 资助金额:
$ 38.49万 - 项目类别:
Transcatheter Strategies for Leaflet Extension to Treat Mitral Regurgitation
经导管小叶延伸治疗二尖瓣关闭不全的策略
- 批准号:
10001587 - 财政年份:2017
- 资助金额:
$ 38.49万 - 项目类别:
相似海外基金
African American (AA) Communities Speak: Partnering with AAs in the North and South to Train Palliative Care Clinicians to Address Interpersonal and Systemic Racism and Provide Culturally Aligned Care
非裔美国人 (AA) 社区发言:与北部和南部的 AA 合作,培训姑息治疗临床医生,以解决人际和系统性种族主义并提供文化一致的护理
- 批准号:
10734272 - 财政年份:2023
- 资助金额:
$ 38.49万 - 项目类别:
GODDESS (Gathering Online for Dialogue and Discussion to Enhance Social Support): Engaging young African American women in a virtual group app to address alcohol misuse, sexual risk, and PrEP in NC
GODDESS(在线聚集进行对话和讨论,以加强社会支持):让年轻的非裔美国女性参与虚拟团体应用程序,以解决北卡罗来纳州的酒精滥用、性风险和 PrEP 问题
- 批准号:
10541028 - 财政年份:2022
- 资助金额:
$ 38.49万 - 项目类别:
GODDESS (Gathering Online for Dialogue and Discussion to Enhance Social Support): Engaging young African American women in a virtual group app to address alcohol misuse, sexual risk, and PrEP in NC
GODDESS(在线聚集进行对话和讨论,以加强社会支持):让年轻的非裔美国女性参与虚拟团体应用程序,以解决北卡罗来纳州的酒精滥用、性风险和 PrEP 问题
- 批准号:
10684239 - 财政年份:2022
- 资助金额:
$ 38.49万 - 项目类别:
A multidimensional Digital Approach to Address Vaccine Hesitancy and Increase COVID-19 Vaccine Uptake among African American Young Adults in the South
解决疫苗犹豫问题并提高南方非裔美国年轻人对 COVID-19 疫苗接种率的多维数字方法
- 批准号:
10395616 - 财政年份:2021
- 资助金额:
$ 38.49万 - 项目类别:
A multidimensional Digital Approach to Address Vaccine Hesitancy and Increase COVID-19 Vaccine Uptake among African American Young Adults in the South
解决疫苗犹豫问题并提高南方非裔美国年轻人对 COVID-19 疫苗接种率的多维数字方法
- 批准号:
10786490 - 财政年份:2021
- 资助金额:
$ 38.49万 - 项目类别:
Reducing Hypertension among African American Men: A Mobile Stress Management Intervention to Address Health Disparities
减少非裔美国男性的高血压:解决健康差异的移动压力管理干预措施
- 批准号:
10821849 - 财政年份:2021
- 资助金额:
$ 38.49万 - 项目类别:
Reducing Hypertension among African American Men: A Mobile Stress Management Intervention to Address Health Disparities
减少非裔美国男性的高血压:解决健康差异的移动压力管理干预措施
- 批准号:
10384110 - 财政年份:2021
- 资助金额:
$ 38.49万 - 项目类别:
A multidimensional Digital Approach to Address Vaccine Hesitancy and Increase COVID-19 Vaccine Uptake among African American Young Adults in the South
解决疫苗犹豫问题并提高南方非裔美国年轻人对 COVID-19 疫苗接种率的多维数字方法
- 批准号:
10336591 - 财政年份:2021
- 资助金额:
$ 38.49万 - 项目类别:
Community-Academic Partnerships to Address COVID-19 Inequities within African American Communities
社区学术伙伴关系解决非裔美国人社区内的 COVID-19 不平等问题
- 批准号:
10245326 - 财政年份:2021
- 资助金额:
$ 38.49万 - 项目类别:
Engaging scientists and communities to address the impacts of substance abuse on American Indian and Alaska Native children and families: The Native Children's Research Exchange Annual Meetings
让科学家和社区参与解决药物滥用对美洲印第安人和阿拉斯加原住民儿童和家庭的影响:原住民儿童研究交流年会
- 批准号:
10657317 - 财政年份:2020
- 资助金额:
$ 38.49万 - 项目类别:














{{item.name}}会员




